Convective Bubbly Flow of Water in an Annular Pipe: Role of Total Dissolved Solids on Heat Transfer Characteristics and Bubble Formation
| Autor: | Mohammad Mohsen Sarafraz, Zhe Tian, Maziar Arjomandi, Mohammad Reza Safaei, Iskander Tlili, Mostafa Safdari Shadloo, Marjan Goodarzi, Tawfeeq Abdullah Alkanhal |
|---|---|
| Přispěvatelé: | Complexe de recherche interprofessionnel en aérothermochimie (CORIA), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Cancer Prognostics and Health Outcomes Unit, Université de Montréal (UdeM), Laboratoire d'Etudes des Systèmes Thermiques et Energétiques [Monastir] (LESTE / ENIM), École Nationale d’Ingénieurs de Monastir (ENIM), Azad University |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Convection
Materials science lcsh:Hydraulic engineering 020209 energy Bubble Geography Planning and Development 02 engineering and technology Heat transfer coefficient Aquatic Science 01 natural sciences Biochemistry 010305 fluids & plasmas [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] Physics::Fluid Dynamics lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Boiling 0103 physical sciences 0202 electrical engineering electronic engineering information engineering contact angle ComputingMilieux_MISCELLANEOUS Water Science and Technology convective flow lcsh:TD201-500 annulus pipe Mechanics radial heat flux total dissolved solid material 6. Clean water Heat flux Heat transfer Liquid bubble Nucleate boiling bubble formation |
| Zdroj: | Water, Vol 11, Iss 8, p 1566 (2019) Water Water, MDPI, 2019, 11 (8), pp.1566. ⟨10.3390/w11081566⟩ Volume 11 Issue 8 |
| ISSN: | 2073-4441 |
| Popis: | Formation of bubbles in water inside an annulus pipe in a flow boiling regime was experimentally investigated. The effect of various variables, such as total dissolved solid materials (TDS) in terms of mass fraction, flow rate of water, and applied heat flux (HF) on the heat transfer coefficient (HTC) and bubble behavior of water, was experimentally investigated. A regression formula was fitted to estimate the average bubble diameter at various TDS values, with accuracy of < 4.1% up to heat flux of 90 kW/m2. Results show that the presence of TDS materials can increase the contact angle of bubble and bubble diameter, and also promotes the HTC value of the system. However, flow rate of water suppressed bubble generation, and increased the heat transfer coefficient due to the renewal of the thermal boundary layer around the boiling surface. Likewise, it was identified that forced convective and nucleate boiling heat transfer mechanisms contribute to the flow of boiling water, and heat flux is a key parameter in determining the mechanism of heat transfer. In the present study, heat flux of 15 kW/m2 at 50 ° C was the heat flux in which onset of nucleate boiling was identified inside the annulus pipe. The contact angle of water at TDS values of 300 mg/L and 1200 mg/L was 74° and 124° respectively, showing the improvement in heat transfer characteristics of water due to the presence of TDS materials. |
| Databáze: | OpenAIRE |
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